code: def _drop_num(self, num: int, partitioner):
      for k, v in self._rp.take(num=num):
          self._rp.delete(k, partitioner=partitioner)
      return self
  
file_path: FATE/python/fate/arch/computing/backends/eggroll/_table.py
imports: import logging
  from typing import Callable, Iterable, Any
  from eggroll.computing import RollPair
  from fate.arch.computing.api import ComputingEngine, KVTable
  from fate.arch.unify import URI
label_desc: Use image node_id 10 for calling the Table obj's underlying member method code with example usage: obj._drop_num(num, partitioner) and returns: self